Is there anyone who use Factom Entry Credits or how to use them.
I'm busy with a project and want to use Factom.
I’m using PHP so I use the curl function.
It seems there is some decoding that I’m not sure of.

Like:
'http://localhost:8088/v1/factoid-balance/f6e117ea838cb652e9cfc3b29552d5887800a7ba614df0bd8c13e171eddc5897' - is working

 and

'http://localhost:8088/v1/factoid-balance/FA2oMzWrkwspnRriJmDvjjiFVfLBzbjUQ28sxgtwvSb3NCytAMnP'  - does not work.
Is there any  example on how to
hash a string
put it in the factom blockchain
retrieve the hash from the factom blockchain.